Undergraduate Students
Mostrando 13-24 de 702 artigos, teses e dissertações.
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13. Síntese verde de 1,3-diariltriazenos simétricos e assimétricos em vinagre
An adaptation on the classical synthesis methodology for 1,3-diaryltriazenes for a 4-hour experimental class has been proposed with green chemistry principles in mind by using commercial vinegar as a source for diazotization with NaNO2 and keeping the reaction workup to simple vacuum filtration. Several anilines with different substituent groups were used to
Quím. Nova. Publicado em: 2021-03
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14. TITULADOR AUTOMÁTICO EM FLUXO-BATELADA UTILIZANDO UM HARDWARE DE CÓDIGO FONTE ABERTO ARDUINO
This work describes the development of an automatic titrometric method in flow-batch with potentiometric detection using alternative and easily accessible materials. Arduino board and its modules, solenoid valves to control the flow rate, peristaltic pump to propel and suction fluids and tubes of inert material to connect the different parts of the Flow-Batc
Quím. Nova. Publicado em: 2021-03
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15. Abdominal ultrasound augments the medical students’ ability to identify free intraabdominal fluid
SUMMARY OBJECTIVE: Free intra-abdominal fluid describes an accumulation of free fluid in the peritoneal cavity. It has different etiologies, but it frequently constitutes a meaningful clinical sign. In this study, the authors interrogate whether abdominal ultrasound augments the medical students’ ability to identify free intra-abdominal fluid. METHODS: T
Rev. Assoc. Med. Bras.. Publicado em: 2021-02
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16. Continuing education in the child health handbook: an educational software for primary care1,
Abstract Objective: To present, the process of development and evaluation of an educational software on the Child Health Handbook proposed for the continuing education of primary care nurses and physicians. Methods: Quantitative study of methodological development. For software development, the following steps were followed: definition of objectives; deter
J. Pediatr. (Rio J.). Publicado em: 2021-02
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17. UTILIZAÇÃO DE BIOMASSA EM AULAS DE GRADUAÇÃO DE QUÍMICA ORGÂNICA EXPERIMENTAL: EXTRAÇÃO DE FLAVONOIDES A PARTIR DE RESÍDUOS DE CASCAS DE FRUTAS CÍTRICAS
This work describes the importance of using renewable sources in experimental classes for undergraduate students, as well as to spread the ideas of using biomass wastes as a source of products of interest. Therefore, in the proposed experiment, citrus fruit peel waste was employed to obtain pure flavonoids by extraction and recristalization. These procedures
Quím. Nova. Publicado em: 2020-12
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18. EXTRACTION AND IDENTIFICATION OF FORMULATIONS OF ANABOLIC ANDROGENIC STEROIDS: A FORENSIC EDUCATIONAL APPROACH
The use of anabolic androgenic steroids is largely restricted worldwide since they are associated with innumerous side effects and health damage. However, apprehensions of formulations of anabolic agents have been extensively increasing throughout the world, making their analysis a common task in the forensic field. In this sense, a set of three experiments
Quím. Nova. Publicado em: 2020-12
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19. A PROBLEMATIZAÇÃO DA ABORDAGEM TEMÁTICA NA FORMAÇÃO INICIAL DE PROFESSORES DE QUÍMICA
The thematic approach supported by Paulo Freire’s reference has been the object of study in the Teaching of Nature Sciences. In this work we analyzed which knowledge is explained by two undergraduate students about limits and potentialities related to the planning and development of a thematic approach promoted in the context of a supervised curricular int
Quím. Nova. Publicado em: 2020-12
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20. Effect of Endodontic Sealer in Young Molars Treated by Undergraduate Students - A Randomized Clinical Trial
Resumo A rápida progressão das lesões de cárie nos dentes molares permanentes de pacientes jovens, frequentemente resulta no tratamento endodôntico. Este ensaio clinico randomizado cego avaliou o efeito de dois cimentos endodônticos (Sealer 26 e AH Plus) na incidência de dor e reparo apical após tratamento endodôntico de dentes molares jovens e iden
Braz. Dent. J.. Publicado em: 2020-11
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21. EXTRAÇÃO ASSISTIDA POR ULTRASSOM PARA DETERMINAÇÃO DE LIPÍDEOS EM ALIMENTOS: UM EXPERIMENTO DE LABORATÓRIO
The ultrasound-assisted extraction (UAE) is an alternative approach for the total lipid content determination in food samples. The high extraction efficiency, being less time-consuming and with the possibility of using less toxic solvents are the main advantages of UAE. It is, thus, an excellent alternative to be applied as a laboratory experiment for underg
Quím. Nova. Publicado em: 2020-09
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22. ESTRATÉGIAS DE ESCRITA PARA ABORDAGEM DA COMUNICAÇÃO PÚBLICA DA CIÊNCIA NA EDUCAÇÃO EM QUÍMICA
Although the impacts of science discoveries are relevant to society, awareness of this intellectual output is still minimal. Much of this communicative failure between researchers and the general public lies in the disclosure, which contributes to the superficiality and misinterpretations of the content served. Strategies need to be found to improve science
Quím. Nova. Publicado em: 2020-09
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23. LEARNING ABOUT EDGE EFFECTS AND ULTRAMICROELECTRODES IN ELECTROCHEMISTRY: SYNERGY BETWEEN EXPERIMENTS AND SIMULATIONS
A short experimental activity aimed at upper level undergraduate students or beginner researchers is presented to introduce the concepts of edge effects and hemispherical diffusion at ultramicroelectrodes. Students will perform simple cyclic voltammetry experiments varying the scan rate and using disk electrodes with different radii. They are then asked to i
Quím. Nova. Publicado em: 2020-09
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24. ELABORAÇÃO E USO DE ANIMAÇÕES COMO ESTRATÉGIA PARA O ENSINO DE MECANISMOS DAS REAÇÕES ORGÂNICAS
The Chemistry of organic compounds is present in many aspects of life on the planet. In addition to many substances in our body being organic compounds, the energy matrix is based on burning fossil fuels, the biodiesel industry is also linked to organic reactions as well as the pharmaceutical industry. However, Organic Reaction Mechanisms is considered one o
Quím. Nova. Publicado em: 2020-09